DocumentCode :
1939536
Title :
Optical magnetic response of laser fabricated Si nanoparticles
Author :
Zywietz, U. ; Evlyukhin, A.B. ; Cheng, William ; Novikov, S.M. ; Reinhardt, C. ; Bozhevolnyi, Sergei I. ; Chichkov, B.N.
Author_Institution :
Laser Zentrum Hannover e. V., Hannover, Germany
fYear :
2013
fDate :
12-16 May 2013
Firstpage :
1
Lastpage :
1
Abstract :
Femtosecond laser-induced transfer, developed for the generation of metallic micro- and nanoparticles [1], is applied to the fabrication of Si nanoparticles. This method allows controllable fabrication of high quality spherical Si nanoparticles with radii of 50-300 nm. Measured light scattering spectra of individual Si nanoparticles demonstrate strong resonant responses in the visible and near-infrared spectral ranges. Theoretical analysis on the basis of Mie theory with a multipole decomposition shows that the first two low-frequency resonances correspond to the magnetic dipole and electric dipole modes. At these resonances, Si nanoparticles generate scattered waves as magnetic and electric dipoles, respectively. Due to high Si permittivity, the magnetic dipole resonance is observed in the visible spectral range for Si nanoparticles with diameters of 100-200 nm. Magnetic optical response of non-spherical Si nanoparticles is also studied using numerical simulations [2]. Possibilities for the realization of isotropic optical metamaterials on the basis of the Si nanoparticles with negative permeability or negative refraction index in the visible spectral range are discussed.
Keywords :
Mie scattering; elemental semiconductors; high-speed optical techniques; infrared spectra; laser magnetic resonance; laser materials processing; light scattering; magnetic moments; magnetic particles; magneto-optical effects; nanofabrication; nanomagnetics; nanoparticles; numerical analysis; optical metamaterials; permeability; permittivity; refractive index; semiconductor growth; silicon; visible spectra; Mie theory; Si; electric dipole modes; femtosecond laser-induced transfer; high Si permittivity; high quality spherical Si nanoparticles; isotropic optical metamaterials; laser fabricated Si nanoparticles; light scattering spectra; low-frequency resonances; magnetic dipole modes; magnetic dipole resonance; metallic microparticles; metallic nanoparticles; multipole decomposition; near-infrared spectral ranges; negative permeability; negative refraction index; numerical simulations; optical magnetic response; scattered waves; size 50 nm to 300 nm; strong resonant responses; theoretical analysis; visible spectral ranges; Magnetic resonance imaging; Nanoparticles; Optical device fabrication; Optical imaging; Optical refraction; Silicon; Ultrafast optics;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Lasers and Electro-Optics Europe (CLEO EUROPE/IQEC), 2013 Conference on and International Quantum Electronics Conference
Conference_Location :
Munich
Print_ISBN :
978-1-4799-0593-5
Type :
conf
DOI :
10.1109/CLEOE-IQEC.2013.6801923
Filename :
6801923
Link To Document :
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